Journal
JOURNAL OF FOOD PROTECTION
Volume 70, Issue 5, Pages 1088-1092Publisher
INT ASSOC FOOD PROTECTION
DOI: 10.4315/0362-028X-70.5.1088
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The efficacy of ozone as a water additive for washing raspberries and strawberries was investigated. Pathogen-inoculated fruits were treated with aqueous ozone concentrations of 1.7 to 8.9 mg/liter at 20 degrees C for 2 to 64 min, with an aqueous ozone concentration of 21 mg/liter at 4 degrees C for 64 min, or with water as a control. Maximum pathogen reductions on raspberries were 5.6 and 4.5 log CFU/g for Escherichia coli O157:H7 and Salmonella, respectively, at 4 degrees C, whereas reductions on strawberries were 2.9 and 3.3 log CFU/g for E. coli O157:H7 and Salmonella, respectively, at 20 degrees C after 64 min. Washing with water (sparging with air as control) resulted in reductions of approximately I log CFU/g. The results presented here indicate that aqueous ozone may be useful as a decontaminant for small fruits.
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